Product Reviews | Windows in the Lakes

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  GS20 Sliding doors are a very special sliding door brand, based on the established Cortizo system and profiles. But that is where the similarity ends. GS20 sliding doors are enhanced, re-engineered and use upgraded components. The result is a sliding door that is better made, with higher performance, unique features, longer-term reliability and one that you can rely on long into the future. 

We’ve created this guide to the GS20 sliding doors to help you understand the product better and help you see the benefits it can provide in your property renovation project. 

GS20 is built to handle large panel sizes with ease:

· Up to 2.5m wide and 3m high per panel

· Up to six sashes available

· Corner and open-corner options for dramatic architectural designs

· Flush stacking – panels slide neatly together, maximising the opening

Whether you’re replacing dated sliders or designing a new extension, GS20 gives you the flexibility to create anything from a two-panel door to a full wall of glass.

Large glass doors must keep your home safe and comfortable. GS20 delivers:

· PAS 24 level security with robust locking systems.

· Thermal efficiency with U-values from 1.3 W/m²K.

· Air, water and wind resistance tested to high European standards (Class 4, 7A and C5).

That means confidence in year-round performance, whatever the weather. The GS20 is only available as a double glazed door, but with the right glass specification it can comfortably meet or exceed current Building Regulations. 

The Cortizo sliding door system is now one of the most popular bonded sliding doors in the UK. But with every popular product comes widespread availability. 

Whilst a popular sliding door is good for keeping prices low, there are things to consider besides the lowest price. 

Cortizo sliding doors are a highly engineered and complex door. They are not suitable for DIY installation and a professional installation is always recommended. 

With many bonded doors, there is no support when out of warranty doors need servicing and repair. Every detail of GS20 doors is retained by the manufacturer so any repair, warranty or even new glass and doors are available to replace as fast as possible. Where other suppliers of bonded sliding doors will be unable to support the product in the future or resort to removing doors from your home and boarding up, GS20 sliding doors are more likely to be serviced and repaired. This is impressive peace of mind in your forever home. 

With GS20, you’re investing in a sliding system that combines the slim profiles of premium European brands with the quality, reliability, and service of a UK manufacturer.

Our White Glove Service is our promise to take care of everything for you. From the moment you choose your windows or doors, we handle the process end-to-end — product advice, survey, installation, and aftercare.

You benefit from the reassurance of national expertise backed by local installers who know your area. 

Every detail is managed with precision, ensuring your new doors and windows are fitted to the highest standard, fully compliant, and supported long after installation.

It’s a complete service designed to give you confidence, convenience, and total peace of mind.

Bifold doors remain one of the most popular ways to connect your home and garden. Slim frames, wide openings, and a contemporary look make them ideal for everything from modern new builds to traditional homes looking for more light and space.
 

But not all bifolds are the same. Many homeowners find themselves comparing doors that, on paper, look almost identical. That’s where the AB-60 bifold door stands apart. AB-60 uses Smart Systems extrusions but is unlike the standard product many other installers use. 

At Fenestration Network, we recommend the AB-60 to homeowners who want something better – a bifold door that has been re-engineered and enhanced from one of the UK’s best-selling and reliable bifold systems. The result? A door with slimmer lines, bigger size options, more detail, and better long-term performance.

One of the frustrations with many bifold doors is adjustment. Over time and depending how often it’s used and whether in a residential or commercial setting, any bifold may need fine-tuning. With most systems that means taking the glass out – a time-consuming and risky process.

The AB-60 solves this. Adjustment is built into the top and bottom of the door, so glass never needs to be removed. This protects the frames, glazing, and finish, while making any future maintenance simple and stress-free.

Another common compromise with standard bifolds is the floating mullion – a bulky section of frame needed when an even number of panels, 2, 4, 6, all slide and fold in one direction. This adds noticeable bulk to the edges of your bifolds where they meet the frame. 

The AB-60 has engineered this out, keeping the sightlines slim and uninterrupted.

The AB-60 isn’t an unproven system. It’s built on one of the UK’s most trusted bifold designs but enhanced and upgraded in key areas. That means you get the reliability of arguably the UK’s best selling bifold door, but with unique features not available anywhere else.

And with matching single and double doors, you can have identical sightlines and hardware as well as a one-brand solution for other doors in your dining room, utility room, upstairs bedroom behind a Juliet Balcony and even as a front fully glazed door or porch.
 

Because the AB-60 is exclusive, you won’t see it in every showroom. That protects its value, avoids endless “cheapest quote” comparisons, and ensures you’re investing in a product that’s genuinely different.
 

• A  bifold with slimmer frames and taller panels than most.
• Independent PAS 24 security testing for peace of mind.
• Easier long-term maintenance with built-in adjustability.
• Premium handles and hardware as standard.
• Matching door options for a consistent design across your home.
• Designed, engineered, and finished to a higher standard than standard bifolds.

Our White Glove Service means every stage of your window or door project is handled with care. From product choice to installation and aftercare, we combine national expertise with local support, ensuring quality, compliance, and complete peace of mind.

 Steel-look glazing has become one of the most sought-after design features in modern homes. The slim lines, industrial styling and New York–style grids add character while letting light flow from room to room.  

At Windows in the Lakes, we know you have very big choice of internal steel look doors and screens. 

With the benefit of our extensive product expertise and knowledge, Aluspace is one of the best on the market. 

Here is everything you need to know about Smart Systems Aluspace internal doors and screens and why this brand could be the best choice for your home. 

Compared to other internal door brands such as Aluco, Origin, Decalu and others, Aluspace internal doors and screens give you more. Bigger sizes, more door options, greater choice of colours and a complementary window and screening system. Ideal for residential or commercial spaces, the doors available within the Aluspace system include:

• Hinged doors – single or double, with optional side or top panels.
• Sliding doors – ultra-slim panels hanging from a top track.
• Pivot doors – a distinctive feature not available from most other brands.
  

Whether you’re creating a home office, dividing a kitchen-diner, or adding privacy to a lounge, AluSpace gives you the design flexibility to suit almost any interior project.

 A further reason why Aluspace is designed better than other brands is its impressive door size capability. Of course, it will work in any standard internal doorway, but it is also designed for disabled access and creating taller door leaves. 

Typical sizes include:

• Hinged doors: up to 900mm wide and 2200mm high per leaf.
• Sliding doors: up to 1200mm wide and 2500mm high per panel.
• Pivot doors: up to 2000mm wide and 2500mm high.
   

Fixed screens can be manufactured in many shapes and sizes, depending on your design at virtually unlimited width with suitable coupling mullions and transoms. 

  As Aluspace internal doors and screens come from the UK’s trusted name in aluminium windows and doors, prices are excellent.
 

From our experience fitting all manner of internal doors and screens,  Aluspace is one of the most affordable, yet one of the most technically capable and best designed. 

Contact us for a competitive quotation for supply and installation in your home. 

Our White Glove Service means every stage of your window or door project is handled with care. From product choice to installation and aftercare, we combine national expertise with local support, ensuring quality, compliance, and complete peace of mind.

If you’re considering steel-look internal doors and screens, Smart Systems AluSpace is one of the best solutions available today. Slim, stylish and flexible, it brings light, character and practicality into your home.

Get in touch with us at Windows in the Lakes to find out more, see where you can view AluSpace in person, and get advice tailored to your project.